From 75506d5acd444c33fd5978772e39a004fb9edff9 Mon Sep 17 00:00:00 2001
From: Jordan Holt <jordan@vimium.com>
Date: Fri, 8 Dec 2023 23:22:40 +0000
Subject: [PATCH] Disable onboard audio, support Digi Pro DAC

---
 hosts/pi/default.nix                | 1 -
 hosts/pi/hardware-configuration.nix | 5 +++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/hosts/pi/default.nix b/hosts/pi/default.nix
index 29b6e71..2b0b609 100644
--- a/hosts/pi/default.nix
+++ b/hosts/pi/default.nix
@@ -13,7 +13,6 @@ with lib.my;
   hardware = {
     raspberry-pi."4" = {
       apply-overlays-dtmerge.enable = true;
-      audio.enable = true;
       fkms-3d.enable = true;
     };
     deviceTree = {
diff --git a/hosts/pi/hardware-configuration.nix b/hosts/pi/hardware-configuration.nix
index 4973e55..1718f25 100644
--- a/hosts/pi/hardware-configuration.nix
+++ b/hosts/pi/hardware-configuration.nix
@@ -5,6 +5,11 @@
     <nixos-hardware/raspberry-pi/4>
   ];
 
+  boot.loader.raspberryPi.firmwareConfig = ''
+    dtoverlay=vc4-kms-v3d,noaudio
+    dtoverlay=hifiberry-digi-pro
+  '';
+
   fileSystems = {
     "/" = {
       device = "/dev/disk/by-label/NIXOS_SD";